NACE CP2 EXAMINATION TEST 2026 FULL QUESTIONS AND SOLUTIONS GRADED A+

NACE CP2 EXAMINATION TEST 2026 FULL
QUESTIONS AND SOLUTIONS GRADED A+

●● An environment where cathodic protection is NOT effective is:


A) liquid
B) soil
C) atmospherically exposed surface
D) concrete.
Answer: c


●● The cathodic protection criteria for steel includes which of the
following? (select all that apply)


A) a potential of -850 mVcse or more negative with current applied after
IR drop is considered.
B) a polarized potential of -850 mVcse or more negative
C) polarization of 100 mVcse or greater
D) a polarized potential of -790 mVssc or more negative.
Answer: a, b, c, d


-790 mVssc = -850 mVcse

,●● Given:
E1 = 20 V
R1 = 10 Ω
R2 = 10 Ω
R3 = 10 Ω
R4 = 10 Ω


What is the current R1?.
Answer: Answer on next slide


●● Given:
E1 = 20 V
R1 = 10 Ω
R2 = 10 Ω
R3 = 10 Ω
R4 = 10 Ω


What is the current R1?


A) 0.29 A
B) 0.67 A

,C) 1.0 A
D) 2.0 A.
Answer: C


R2,3,4 = 1/30 + 1/30 + 1/30
R2,3,4 = 0.033 + 0.033 + 0.033
R2,3,4 = .099
R2,34 = 10.1 Ω
Rt = R1 + R2,3,4
Rt = 10 Ω + 10.1 Ω
Rt = 20.1 Ω


I = 20 V / 20.1 Ω
I = 0.995 A or 1.0 A


●● When cathodic protection is applied to a
corroding steel surface, it shifts the corrosion cell potential at the
_____________


A) no change in potential
B) cathode more negative
C) cathode more positive

, D) anode more positive.
Answer: b


●● Cathodic protection polarizes:


A) the potential of the structure anode to the open circuit potential of the
structure cathode
B) the potential of the structure cathode to the open circuit potential of
the structure anode
C) the potential of the structure cathode to the open circuit potential of
the CP anode
D) the CP anode potential to the open circuit potential of the structure
cathode.
Answer: b


●● Polarization occurs


A) at the anode surface only
B) at the cathode surface only
C) at the anode and cathode surfaces
D) in the metallic path.
Answer: c